Passive coherent beam combining of quantum-cascade lasers with a Dammann grating

Passive coherent beam combining of quantum-cascade lasers with a Dammann grating

An external cavity using a binary phase grating has been developed to achieve coherent combining of five quantum-cascade lasers emitting at 4.65 μm. The grating phase profile is designed to combine five beams of equal intensities into a single beam with a good efficiency (~75%). The performances of...

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Veröffentlicht in:Optics letters 2011-10, Vol.36 (19), p.3810-3812
Hauptverfasser: BLOOM, G, LARAT, C, GEORGES, P, LALLIER, E, LEHOUCQ, G, BANSROPUN, S, LEE-BOUHOURS, M.-S. L, LOISEAUX, B, CARRAS, M, MARCADET, X, LUCAS-LECLIN, G
Format: Artikel
Sprache:eng
Schlagworte:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Lasers
Optics
Physics
Semiconductor lasers
laser diodes
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Zusammenfassung:An external cavity using a binary phase grating has been developed to achieve coherent combining of five quantum-cascade lasers emitting at 4.65 μm. The grating phase profile is designed to combine five beams of equal intensities into a single beam with a good efficiency (~75%). The performances of this cavity concerning output power, stability, combining efficiency and beam quality are detailed. We report a CW combining efficiency of 66% corresponding to an output power of ~0.5 W with a good beam quality (M(2)
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.36.003810